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Equivariant Morse equation

Marcin Styborski — 2012

Open Mathematics

The paper is concerned with the Morse equation for flows in a representation of a compact Lie group. As a consequence of this equation we give a relationship between the equivariant Conley index of an isolated invariant set of the flow given by .x = −∇f(x) and the gradient equivariant degree of ∇f. Some multiplicity results are also presented.

Degree of T-equivariant maps in ℝⁿ

Joanna JanczewskaMarcin Styborski — 2007

Banach Center Publications

A special case of G-equivariant degree is defined, where G = ℤ₂, and the action is determined by an involution T : p q p q given by T(u,v) = (u,-v). The presented construction is self-contained. It is also shown that two T-equivariant gradient maps f , g : ( , S n - 1 ) ( , 0 ) are T-homotopic iff they are gradient T-homotopic. This is an equivariant generalization of the result due to Parusiński.

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